Bratashov Daniil N. RussiaSaratovSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia dn2010@gmail.com Author's articles Investigation of Interaction Between Silicon-Based Nanoparticles and HeLa Cells Atomic Force Microscopy Study of the Surface of Films of Chitosan and Its Salts with Organic Acids